OSX compile error

[RonanCodes]

I have Gambit installed on OSX Yosemite.
When I run the ./compile.sh I get the following error:

bh.scm:
*** ERROR -- missing or invalid linking information for module "/Library/Gambit/v4.8.4/lib//_gambcgsc"
clang: error: no such file or directory: 'bh_.c'
clang: error: no input files
*** ERROR IN ##main -- C compilation or link failed while compiling "bh_.c"

I don't have the file _gambcgsc in the lib directory.
However I do have _gambitgsc.c.
If I change _gambcgsc to _gambitgsc I don't get errors but it stalls:

bh.scm:
bh_.c:
bh.c:

Any ideas?